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Neo4j - Fabric
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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.fabric.config;

import java.time.Duration;
import java.util.Optional;
import java.util.function.Supplier;

import org.neo4j.configuration.Config;
import org.neo4j.configuration.GraphDatabaseSettings;
import org.neo4j.kernel.database.NormalizedDatabaseName;

public class FabricConfig
{
    private final Supplier transactionTimeout;
    private final DataStream dataStream;
    private final boolean routingEnabled;
    private final boolean enabledByDefault;

    public FabricConfig( Supplier transactionTimeout, DataStream dataStream, boolean routingEnabled, boolean enabledByDefault )
    {
        this.transactionTimeout = transactionTimeout;
        this.dataStream = dataStream;
        this.routingEnabled = routingEnabled;
        this.enabledByDefault = enabledByDefault;
    }

    public Duration getTransactionTimeout()
    {
        return transactionTimeout.get();
    }

    public DataStream getDataStream()
    {
        return dataStream;
    }

    public Optional getFabricDatabaseName()
    {
        return Optional.empty();
    }

    public boolean isRoutingEnabled()
    {
        return routingEnabled;
    }

    public boolean isEnabledByDefault()
    {
        return enabledByDefault;
    }

    public static FabricConfig from( Config config )
    {
        var syncBatchSize = config.get( FabricSettings.batch_size_setting );
        // the rest of the settings are not used for any type of queries supported in CE
        var dataStream = new DataStream( 0, 0, syncBatchSize, 0 );
        var enabledByDefault = config.get( FabricSettings.enabled_by_default );
        return new FabricConfig( () -> config.get( GraphDatabaseSettings.transaction_timeout ), dataStream, false, enabledByDefault );
    }

    public static class DataStream
    {
        private final int bufferLowWatermark;
        private final int bufferSize;
        private final int batchSize;
        private final int concurrency;

        public DataStream( int bufferLowWatermark, int bufferSize, int batchSize, int concurrency )
        {
            if ( bufferLowWatermark > bufferSize )
            {
                this.bufferLowWatermark = bufferSize;
            }
            else
            {
                this.bufferLowWatermark = bufferLowWatermark;
            }

            this.bufferSize = bufferSize;
            this.batchSize = batchSize;
            this.concurrency = concurrency;
        }

        public int getBufferLowWatermark()
        {
            return bufferLowWatermark;
        }

        public int getBufferSize()
        {
            return bufferSize;
        }

        public int getBatchSize()
        {
            return batchSize;
        }

        public int getConcurrency()
        {
            return concurrency;
        }
    }
}